Dana dudley



(No Model?) B. DUDLEY;

ROTARY ENGINE.

Patented Aug. '7, 1883.

A Q .5 J T F Inventor, Jana, Zwdla PETERS. mum-0 1 mm Vlfllliwglm, n. c,v

" 'NITED STATES PATENT GFFICE DANA DUDLEY, or BOSTON, MAssL, ASSIGNORTODAviD s. e. DoANE, or GOHASSET, MAss, AND D. A. PLEGKER, or MOUNTonAwroRD, vA.

ROTARY ENGINE.

SPECIFICATION forming part of Letters Patent No. 282,505, dated August'7, 1883, I Application filed January 9,1883. (.No model.)

T at whom it may concern:

Be it known that I, DANA DUDLEY, of Boston, in'the county of Suffolk, ofthe Commonwealth of Massachusetts, have invented a new and usefulImprovementin Rotary Engines;

and I do hereby declare the same to be described in the followingspecification and represented in the accompanying drawings, of which--Figure 1 is a longitudinal section, and Fig. 2 a transverse section, ofan engine containing or provided with my invention, the nature of whichis defined in the claims hereinafter presented. Fig. 3 is a sectionshowingthe rotary I 5 cylinder as having two pistons.

I11 the said drawings, A denotes a drum,

which, when in use, is to be stationary or confined to a fioor orsupport, B. Extending through stuffingboxes a a, projecting from theheads b b of the said drum, is a shaft, 0, pro ,vided with one or morefly wheels, D D, and one or more driving-pulleys, E E, fixed to it, theybeing arranged 011 it iirmanner as I represented in Fig. 2, the shaftbeing concentric with the drum. On and fastened to this shaft, andwithin the drum, is a cylinder, F, which has arranged and adapted tomove radially in it three pistons, G, each of which is provided with aspring, H, to force it against the inner periphery of the drum, the endof each piston that bears against the drum being rounded or formedangular, as represented. The inner periphery of the drum, for a shortdistance, is in contact with the circumference of the cylinder, as shownat I,-the projection I terminating in inclined planes 0 cl, throughwhich, as shown in Fig. 1, are openings 6 e, that communicate with twopipes, K L, each I of such pipes being provided with one of two 4cstop-cocks M N. The projection I fits to the periphery of the cylinder,and is or may be termed the cylinder bearing. Opening into each of thesaid pipes K L, between the drum and the stop-cock of said pipe, is oneof a stop-cock, such cocks being shown at R and S. A pipe or educt, T,leads out of the upper part of the drum.

Fig. 3 represents the cylinderF as provided with but two of the pistonsG, it having, be-

two pipes O I, each of which is provided with sides the induction-pipe Kand eduction-pipe T, an auxiliary educt, T, the latter being ar- Iranged to open through the projection or cylinder-bearing I. This figureis to represent the main principle of my invention, which is alsoshownin Fig. 1, in which the engine is exhibited as constructed to admit ofits cylinder being revolved either in one or in the op posite directionby steam. As made, as shown I in Fig. 3, the cylinder can be revolvedbut one way by steam. This principle consists in having besides the mainexhaust-educt an auxiliary educt for discharge of the steam, suchauxiliary educt being to prevent the resistance due to compression ofthesteam between the part I and the main educt T after either piston mayhave passed the said educt and the other is propelling the cylinder bysteam let into the space between it and the projection I. The

steam enters the drum by the pipe K, and de parts from it through thetwoeducts Tand T. Generally speaking, when the cylinder F is rapidlyrevolving, the steam in advance of a piston does not have time to escapeby the main educt, in which case the portion of steam '7 5 remainingwill become cushioned 'orcompressed in the space in advance of thepiston and between it and the projection I, and in so doing will offerresistance to the revolution of the cylinder. By having the auxiliaryeduct T, this steam will readily escape. Without the auxiliary educt theengine, as shown in Fig. 3, 'is without novelty.

In regard to the engine represented in Figs. 1 and 2, the pipes K and Lare to be supposed to communicate with the steam-boiler, and the pipes Oand P to open into the atmosphere or a suitable reservoir or condenserof steam. Un der such circumstances, should it be desirable to revolvethe cylinderG in the direction indio cated by the arrow x, we are toclose the stopcocksN andR and open the stop-cocks M and S, in which casethe cylinder will be driven in the direction of the said arrow :20, andwill exhaust by the two educts T and I, the steam 5 that may be inadvance of such piston after its passage by the main eductT escaping bythe I other auxiliary educt, P. Should it be desirable to drive thecylinder in the opposite way that is, in the direction of the arrowy-the 10o stop-cocks M and S are to be closed and the stop-cocks N andRare'to be opened. On such being done the cylinder will turn in thedirection of the said arrow y, the waste steam escaping by the edu'cts Tand 0.

An engine constructed as described can have its cylinder very rapidlyrevolved with little or no resistance from steam compressed in advanceof a piston and between such and the bearing I.

I claim- 1. The combination of the auxiliary exhausteduct with the drumand its cylinder-bearing, the cylinder," and its pistons and theirsprings,

and steam-induct and main eXhaust-educt, all

being adapted and to operate substantially as set forth.

2. The combination of the system of pipes I O, K, L, and 1, providedwith stop-cocks M,

N, R, and S, and adapted, as described, with 20 DANA DUDLEY.

Witnesses:

R. H. EDDY, i I 1%. H. EADY.

